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The Single UNIX &reg; Specification, Version 2<br>
Copyright &copy; 1997 The Open Group

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<h4><a name = "tag_000_007_1735">&nbsp;</a>NAME</h4><blockquote>
ptsname - get name of the slave pseudo-terminal device
</blockquote><h4><a name = "tag_000_007_1736">&nbsp;</a>SYNOPSIS</h4><blockquote>
<pre><code>

#include &lt;<a href="stdlib.h.html">stdlib.h</a>&gt;

char *ptsname(int <i>fildes</i>);
</code>
</pre>
</blockquote><h4><a name = "tag_000_007_1737">&nbsp;</a>DESCRIPTION</h4><blockquote>
The
<i>ptsname()</i>
function returns the name of the slave pseudo-terminal device associated with
a master pseudo-terminal device.  The <i>fildes</i> argument is a file
descriptor that refers to the master device.  The
<i>ptsname()</i>
function returns a pointer to a string containing the pathname of the
corresponding slave device.
<p>
This interface need not be reentrant.
</blockquote><h4><a name = "tag_000_007_1738">&nbsp;</a>RETURN VALUE</h4><blockquote>
Upon successful completion,
<i>ptsname()</i>
returns a pointer to a string which is the name of the pseudo-terminal slave
device.
Upon failure,
<i>ptsname()</i>
returns a null pointer.  This could occur if <i>fildes</i> is an invalid file
descriptor or if the slave device name does not exist in the file system.
</blockquote><h4><a name = "tag_000_007_1739">&nbsp;</a>ERRORS</h4><blockquote>
No errors are defined.
</blockquote><h4><a name = "tag_000_007_1740">&nbsp;</a>EXAMPLES</h4><blockquote>
None.
</blockquote><h4><a name = "tag_000_007_1741">&nbsp;</a>APPLICATION USAGE</h4><blockquote>
The value returned may point to a static data area that is overwritten by each
call to
<i>ptsname()</i>.
</blockquote><h4><a name = "tag_000_007_1742">&nbsp;</a>FUTURE DIRECTIONS</h4><blockquote>
None.
</blockquote><h4><a name = "tag_000_007_1743">&nbsp;</a>SEE ALSO</h4><blockquote>
<i><a href="grantpt.html">grantpt()</a></i>,
<i><a href="open.html">open()</a></i>,
<i><a href="ttyname.html">ttyname()</a></i>,
<i><a href="unlockpt.html">unlockpt()</a></i>,
<i><a href="stdlib.h.html">&lt;stdlib.h&gt;</a></i>.
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UNIX &reg; is a registered Trademark of The Open Group.<br>
Copyright &copy; 1997 The Open Group
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